Claire ran 20 miles in 4 hours. What was her average speed?

The atomic mass is important because A. it tells the size of the atom. B. it tells you the charge of the atom . C. it tells you the number of electrons.

16. Which element has th17. Magnesium, Mg, tends to form a + 2 ion. Which will have the larger atomic radius? Mg or Mg2 + (Explain why) e greater electronegativity: fluorine or lithium? What does this mean?

What is the difference between o2 and f2

An unsaturated aqueous solution of NH3 is at 90.°C in 100. grams of water. According to Reference Table G, how many grams of NH3 could this unsaturated solution contain? (1) 5 g (3) 15 g (2) 10. g (4) 20. g

Determine the frequency of light with a ... of light with a wavelength of 4.257 x 10^-7 cm

How many moles of h2so4 are required to react with 6.80 miles of al2o3

Which explanation best describes a wave? A. a disturbance that travels through a medium with a transfer of energy and matter B. a disturbance that travels through a medium without a transfer of energy and matter C.

The requirements for one type of atom to substitute for another in a solid solution are:

How could you separate items that are different densities? explain

Why do elements within a period of the periodic table have different properties